Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Fiat 500X PopFACTORY OEM SERVICE PROCEDURE
Description And Operation: Operation
- The air temperature sensor consists of an NTC (Negative Temperature Coefficient) thermistor.
- The resistance offered by the sensor decreases as the temperature increases.
- The control unit input circuit divides the 5 V reference voltage between the sensor resistance and a fixed reference value; in this way it achieves a voltage proportional to the resistance, and thus to the temperature.
| T-map Temperature Sensor Specifications | ||||||||
|---|---|---|---|---|---|---|---|---|
| °C | °F | Rn (ohm) | °C | °F | Rn (ohm) | °C | °F | Rn (ohm) |
| -40 | -40 | 45303 | 20 | 68 | 2499 | 80 | 176 | 322 |
| -35 | -31 | 34273 | 25 | 77 | 2056 | 85 | 185 | 279 |
| -30 | -22 | 26108 | 30 | 86 | 1706 | 90 | 194 | 243 |
| -25 | -13 | 19999 | 35 | 95 | 1411 | 95 | 203 | 212 |
| -20 | -4 | 15458 | 40 | 104 | 1174 | 100 | 212 | 186 |
| -15 | 5 | 12000 | 45 | 113 | 987 | 105 | 221 | 163 |
| -10 | 14 | 9395 | 50 | 122 | 833 | 110 | 230 | 144 |
| -5 | 23 | 7413 | 55 | 131 | 702 | 115 | 239 | 127 |
| 0 | 32 | 5895 | 60 | 140 | 595 | 120 | 248 | 112 |
| 5 | 41 | 4711 | 65 | 149 | 508 | 125 | 257 | 110 |
| 10 | 50 | 3791 | 70 | 158 | 435 | 130 | 266 | 89 |
| 15 | 59 | 3068 | 75 | 167 | 374 | 135 | 275 | 79 |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.